GWD 13 q7 求助

wangzhuo422

For a certain race, 3 teams were allowed to enter 3 members each.A team earned 6 – n points whenever one of its members finished in nth place, where 1 ≤ n ≤ 5.There were no ties, disqualifications, orwithdrawals.If no team earned more than 6 points, what is the least possible score a team could have earned?


A.0
B.1
C.2
D.3
E.4
Answer: D

这题什么意思呀。。不懂

earl911

假设A B C三个组，每组有三个人参加比赛，共9人。取 前五名及成绩，第一第二……第五分别得分为5,4,3,2,1分。每组最终得分没有超过6分的，问得分最少的组可能得到的最小分数。

思路：让C组得分最小，则A B 都要得分最大，即为6分，A组得了个第一和第五，5+1=6，B组得了个第二和第四，4+2=6。 前五名只剩第三了，C组肯定有个得第三的，否则AB组就会超分。C组第三名得分3分。答案D